A DGNSS Single Frequency Carrier Phase Batch Processor with High Integrity

Jidong Huang and Frank van Graas

Abstract:	A Differential Global Navigation Satellite System (DGNSS) single frequency Carrier Phase (CP) batch processor is developed in this paper. This batch processor estimates both the differential position solution and the ambiguities on the differential CP measurements. The design of the batch processor uses the time-varying geometry change information to minimize the affects of time-varying measurement errors, for instance, ionospheric and/or tropospheric spatial decorrelation errors. The paper provides batch processor results for simulations over a 10-km static baseline. To compensate for the reduced observability due to the use of CP measurements only and to obtain decimeter level accuracy, the batch processor requires at least seven satellites for convergence times on the order of tens of minutes. Significantly faster convergence times, on the order of a few minutes, are obtained with multiple constellations, such as a combined GPS/Galileo constellation, which results in a practical carrier phase only batch processor. Integrity analysis is performed for the batch processor through the injection of different types of time-varying errors into the differential CP measurements. Results show that GPS alone provides a limited fault detection/excursion capability. However, the combined GPS/Galileo constellation provides a very high fault detection/ excursion capability.
Published in:	Proceedings of the 63rd Annual Meeting of The Institute of Navigation (2007) April 23 - 25, 2007 Royal Sonesta Hotel Cambridge, MA
Pages:	305 - 320
Cite this article:	Huang, Jidong, van Graas, Frank, "A DGNSS Single Frequency Carrier Phase Batch Processor with High Integrity," Proceedings of the 63rd Annual Meeting of The Institute of Navigation (2007), Cambridge, MA, April 2007, pp. 305-320.
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